Table 4.
Relationship between whether or not the focal individual produced a vocal response to the pant hoot produced by another individual and the investigated independent variables. Reference levels are in brackets (reference for ‘activity’ is resting).
| Term | Estimate | SE | Lower CI | Upper CI | χ2 | z-value | P |
|---|---|---|---|---|---|---|---|
| Intercept | -2.269 | 0.967 | -4.032 | 0.416 | |||
| Gregariousness | -0.386 | 0.410 | -1.195 | 0.714 | |||
| Age | -0.061 | 0.517 | -1.453 | 1.160 | |||
| Sex (male) | -1.024 | 0.860 | -3.128 | 0.840 | |||
| Mother chorus | 2.630 | 0.659 | 0.787 | 3.792 | 17.123 | < 0.001 | |
| Call from within party | 0.436 | 0.548 | -0.694 | 1.723 | 0.621 | 0.430 | |
| Solo call | -0.218 | 0.375 | -0.976 | 0.622 | 0.341 | 0.562 | |
| Number of females | -0.480 | 0.256 | -0.933 | 0.181 | 3.696 | 0.055 | |
| Number of males | 0.353 | 0.243 | -0.208 | 1.048 | |||
| Activity: feeding | 0.634 | 0.481 | -0.642 | 1.553 | 1.318 | 0.186 | |
| Activity: other | 0.614 | 0.592 | -0.797 | 1.899 | 1.037 | 0.298 | |
| Activity: social | -0.200 | 0.624 | -1.619 | 1.306 | -0.320 | 0.751 | |
| Age*Sex (male) | 2.286 | 1.050 | -0.322 | 4.458 | 4.411 | 0.035 | |
| Age*Gregariousness | 1.759 | 0.791 | -0.435 | 3.237 | 4.655 | 0.030 | |
|
Gregariousness* Number of males |
0.501 | 0.235 | -0.228 | 1.066 | 4.554 | 0.024 |
CI: confidence interval. Interactions are represented by an asterisk between variables. Control variables are in italic. Significant results are depicted in bold.